From e275caddb607b8ff37569be66f1bf44303919502 Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Fri, 10 Mar 2023 18:19:26 +0100
Subject: vidhar: dscp

---
 hosts/vidhar/borg/default.nix    |   2 +
 hosts/vidhar/network/default.nix |   8 ++
 hosts/vidhar/network/dsl.nix     |  11 ++-
 hosts/vidhar/network/ruleset.nft | 183 +++++++++++++++++++++++++++++++++++++++
 4 files changed, 200 insertions(+), 4 deletions(-)

(limited to 'hosts/vidhar')

diff --git a/hosts/vidhar/borg/default.nix b/hosts/vidhar/borg/default.nix
index dfd4885e..d6d64ec8 100644
--- a/hosts/vidhar/borg/default.nix
+++ b/hosts/vidhar/borg/default.nix
@@ -19,6 +19,8 @@ let
       BatchMode yes
       ServerAliveInterval 10
       ServerAliveCountMax 30
+
+      IPQoS cs1
   '';
 
   checkBorgUnit = {
diff --git a/hosts/vidhar/network/default.nix b/hosts/vidhar/network/default.nix
index 1d0f5465..e89f304a 100644
--- a/hosts/vidhar/network/default.nix
+++ b/hosts/vidhar/network/default.nix
@@ -43,6 +43,14 @@ with lib;
           id = 4;
           interface = "eno2";
         };
+        printer = {
+          id = 5;
+          interface = "eno2";
+        };
+        modem = {
+          id = 6;
+          interface = "eno2";
+        };
       };
 
       firewall.enable = false;
diff --git a/hosts/vidhar/network/dsl.nix b/hosts/vidhar/network/dsl.nix
index aa2adf4b..2655b09a 100644
--- a/hosts/vidhar/network/dsl.nix
+++ b/hosts/vidhar/network/dsl.nix
@@ -66,16 +66,19 @@ in {
           text = ''
             ethtool -K telekom tso off gso off gro off
 
-            tc qdisc replace dev "${pppInterface}" root cake memlimit 64Mb pppoe-ptm nat diffserv4 wash bandwidth 35mbit
-
             modprobe ifb
             ip link del "ifb4${pppInterface}" || true
             ip link add name "ifb4${pppInterface}" type ifb
+            ip link set "ifb4${pppInterface}" up
+
+            tc qdisc del dev "ifb4${pppInterface}" root || true
             tc qdisc del dev "${pppInterface}" ingress || true
+            tc qdisc del dev "${pppInterface}" root || true
+
             tc qdisc add dev "${pppInterface}" handle ffff: ingress
+            tc filter add dev "${pppInterface}" parent ffff: basic action ctinfo dscp 0x0000003f 0x00000040 action mirred egress redirect dev "ifb4${pppInterface}"
             tc qdisc replace dev "ifb4${pppInterface}" root cake memlimit 64Mb pppoe-ptm diffserv4 bandwidth 93mbit
-            ip link set "ifb4${pppInterface}" up
-            tc filter add dev "${pppInterface}" parent ffff: matchall action mirred egress redirect dev "ifb4${pppInterface}"
+            tc qdisc replace dev "${pppInterface}" root cake memlimit 64Mb pppoe-ptm nat diffserv4 wash bandwidth 35mbit
           '';
         };
       in "${app}/bin/${app.meta.mainProgram}";
diff --git a/hosts/vidhar/network/ruleset.nft b/hosts/vidhar/network/ruleset.nft
index 833013e9..30db0ac3 100644
--- a/hosts/vidhar/network/ruleset.nft
+++ b/hosts/vidhar/network/ruleset.nft
@@ -270,3 +270,186 @@ table ip mss_clamp {
     oifname dsl tcp flags & (syn|rst) == syn counter name dsl-mss-clamp tcp option maxseg size set rt mtu
   }
 }
+
+## Masks for extracting/storing data in the conntrack mark
+# define ct_dscp = 0x0000003f
+# define ct_dyn = 0x00000080
+# define ct_dyn_static_dscp = 0x000000ff
+define ct_static = 0x00000040
+define ct_unused = 0xffffff80
+# define ct_unused_dscp = 0xffffff3f
+# define ct_unused_dyn = 0xffffff80
+
+## DSCP classification values
+define cs0 = 0
+define lephb = 1
+define cs1 = 8
+define af11 = 10
+define af12 = 12
+define af13 = 14
+define cs2 = 16
+define af21 = 18
+define af22 = 20
+define af23 = 22
+define cs3 = 24
+define af31 = 26
+define af32 = 28
+define af33 = 30
+define cs4 = 32
+define af41 = 34
+define af42 = 36
+define af43 = 38
+define cs5 = 40
+define va = 44
+define ef = 46
+define cs6 = 48
+define cs7 = 56
+
+table inet dscpclassify {
+    ## Set conntrack DSCP mark without modifying unused bits
+    chain ct_set_cs0 {
+        ct mark set ct mark and $ct_unused or $cs0
+    }
+
+    chain ct_set_lephb {
+        ct mark set ct mark and $ct_unused or $lephb or $ct_static
+    }
+
+    chain ct_set_cs1 {
+        ct mark set ct mark and $ct_unused or $cs1 or $ct_static
+    }
+
+    chain ct_set_af11 {
+        ct mark set ct mark and $ct_unused or $af11 or $ct_static
+    }
+
+    chain ct_set_af12 {
+        ct mark set ct mark and $ct_unused or $af12 or $ct_static
+    }
+
+    chain ct_set_af13 {
+        ct mark set ct mark and $ct_unused or $af13 or $ct_static
+    }
+
+    chain ct_set_cs2 {
+        ct mark set ct mark and $ct_unused or $cs2 or $ct_static
+    }
+
+    chain ct_set_af21 {
+        ct mark set ct mark and $ct_unused or $af21 or $ct_static
+    }
+
+    chain ct_set_af22 {
+        ct mark set ct mark and $ct_unused or $af22 or $ct_static
+    }
+
+    chain ct_set_af23 {
+        ct mark set ct mark and $ct_unused or $af23 or $ct_static
+    }
+
+    chain ct_set_cs3 {
+        ct mark set ct mark and $ct_unused or $cs3 or $ct_static
+    }
+
+    chain ct_set_af31 {
+        ct mark set ct mark and $ct_unused or $af31 or $ct_static
+    }
+
+    chain ct_set_af32 {
+        ct mark set ct mark and $ct_unused or $af32 or $ct_static
+    }
+
+    chain ct_set_af33 {
+        ct mark set ct mark and $ct_unused or $af33 or $ct_static
+    }
+
+    chain ct_set_cs4 {
+        ct mark set ct mark and $ct_unused or $cs4 or $ct_static
+    }
+
+    chain ct_set_af41 {
+        ct mark set ct mark and $ct_unused or $af41 or $ct_static
+    }
+
+    chain ct_set_af42 {
+        ct mark set ct mark and $ct_unused or $af42 or $ct_static
+    }
+
+    chain ct_set_af43 {
+        ct mark set ct mark and $ct_unused or $af43 or $ct_static
+    }
+
+    chain ct_set_cs5 {
+        ct mark set ct mark and $ct_unused or $cs5 or $ct_static
+    }
+
+    chain ct_set_va {
+        ct mark set ct mark and $ct_unused or $va or $ct_static
+    }
+
+    chain ct_set_ef {
+        ct mark set ct mark and $ct_unused or $ef or $ct_static
+    }
+
+    chain ct_set_cs6 {
+        ct mark set ct mark and $ct_unused or $cs6 or $ct_static
+    }
+
+    chain ct_set_cs7 {
+        ct mark set ct mark and $ct_unused or $cs7 or $ct_static
+    }
+
+    chain postrouting {
+	type filter hook postrouting priority filter + 1; policy accept
+
+	oifname != dsl return
+
+	ip dscp cs0 goto ct_set_cs0
+	ip dscp lephb goto ct_set_lephb
+	ip dscp cs1 goto ct_set_cs1
+	ip dscp af11 goto ct_set_af11
+	ip dscp af12 goto ct_set_af12
+	ip dscp af13 goto ct_set_af13
+	ip dscp cs2 goto ct_set_cs2
+	ip dscp af21 goto ct_set_af21
+	ip dscp af22 goto ct_set_af22
+	ip dscp af23 goto ct_set_af23
+	ip dscp cs3 goto ct_set_cs3
+	ip dscp af31 goto ct_set_af31
+	ip dscp af32 goto ct_set_af32
+	ip dscp af33 goto ct_set_af33
+	ip dscp cs4 goto ct_set_cs4
+	ip dscp af41 goto ct_set_af41
+	ip dscp af42 goto ct_set_af42
+	ip dscp af43 goto ct_set_af43
+	ip dscp cs5 goto ct_set_cs5
+	ip dscp va goto ct_set_va
+	ip dscp ef goto ct_set_ef
+	ip dscp cs6 goto ct_set_cs6
+	ip dscp cs7 goto ct_set_cs7
+
+	ip6 dscp cs0 goto ct_set_cs0
+	ip6 dscp lephb goto ct_set_lephb
+	ip6 dscp cs1 goto ct_set_cs1
+	ip6 dscp af11 goto ct_set_af11
+	ip6 dscp af12 goto ct_set_af12
+	ip6 dscp af13 goto ct_set_af13
+	ip6 dscp cs2 goto ct_set_cs2
+	ip6 dscp af21 goto ct_set_af21
+	ip6 dscp af22 goto ct_set_af22
+	ip6 dscp af23 goto ct_set_af23
+	ip6 dscp cs3 goto ct_set_cs3
+	ip6 dscp af31 goto ct_set_af31
+	ip6 dscp af32 goto ct_set_af32
+	ip6 dscp af33 goto ct_set_af33
+	ip6 dscp cs4 goto ct_set_cs4
+	ip6 dscp af41 goto ct_set_af41
+	ip6 dscp af42 goto ct_set_af42
+	ip6 dscp af43 goto ct_set_af43
+	ip6 dscp cs5 goto ct_set_cs5
+	ip6 dscp va goto ct_set_va
+	ip6 dscp ef goto ct_set_ef
+	ip6 dscp cs6 goto ct_set_cs6
+	ip6 dscp cs7 goto ct_set_cs7
+    }
+}
-- 
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